docs: add repo installation instrructions

README.md

@@ -18,7 +18,61 @@ Convertis is available on GNU/Linux for Debian-based systems and Fedora/CentOS-b
 
 Packages are published for both the gnu and musl targets, although the gnu build should always be preferred.
 
-See <https://git.ewenlau.net/ewenlau/convertis/packages> for options.
+#### RPM
+
+Add the RPM repo via the .repo file:
+
+On RedHat distros:
+
+```sh
+dnf config-manager --add-repo https://git.ewenlau.net/ewenlau/convertis/raw/branch/main/repo/gitea-ewenlau.repo
+```
+
+On Fedora 41+:
+
+```sh
+dnf config-manager addrepo --from-repofile=https://git.ewenlau.net/ewenlau/convertis/raw/branch/main/repo/gitea-ewenlau.repo
+```
+
+On SUSE distros:
+
+```sh
+zypper addrepo -f https://git.ewenlau.net/ewenlau/convertis/raw/branch/main/repo/gitea-ewenlau.repo
+```
+
+Then, install the package:
+
+On RedHat/Fedora:
+```sh
+dnf install convertis-gnu
+```
+
+On SUSE distros:
+```sh
+zypper install convertis-gnu
+```
+
+#### APT
+
+Add the repo:
+
+```sh
+sudo curl https://git.ewenlau.net/api/packages/ewenlau/debian/repository.key -o /etc/apt/keyrings/gitea-ewenlau.asc
+echo "deb [signed-by=/etc/apt/keyrings/gitea-ewenlau.asc] https://git.ewenlau.net/api/packages/ewenlau/debian $distribution $component" | sudo tee -a /etc/apt/sources.list.d/gitea.list
+sudo apt update
+```
+
+Then, install the package:
+
+```sh
+sudo apt install convertis-gnu
+```
+
+If you want to install a specific version, append =<version-number>-1. For instance, to install version 0.2.0:
+
+```sh
+sudo apt install convertis-gnu=0.2.0-1
+```
 
 ### Manual package install